Ball By Yourself STRAP!  LAUNCHING MARCH 16TH. FOR $39.99 Create the same great basketball skills as with the original Ball By Yourself, but with an added NEW feature. Players can now strap any 27.5, 28.5 and 29.5 Basketball and train for hrs. building fundamental skills and when you are done, simply unstrap from the ball and enjoy as a traditional basketball again. Take your training and playing skills anywhere and never chase loose balls again!